温度对高强度低合金钢和双相钢成型极限的影响

IF 3.3 Q2 ENGINEERING, MANUFACTURING
N. Woellner, M. L. Gipiela, S. F. Lajarin, C. J. Rebeyka, C. Nikhare, Paulo V. P. Marcondes
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引用次数: 0

摘要

高强度钢(HSS)是普通钢材的良好替代品,可减轻汽车重量,从而降低油耗。尽管高强度钢具有优异的机械性能和较轻的重量,但其在工业中的应用仍然有限,因为制造此类材料存在诸多限制,尤其是在成型性方面。文献显示,回弹是最常见的问题。根据文献记载,在可用于最小化回弹问题的参数中,温度似乎是对最小化回弹影响最大的参数之一。然而,温度升高对材料成型极限的影响尚未完全明了。本研究旨在确定使用温升技术对高强度钢成型极限的影响。研究了两种不同的钢(HSLA 350/440 和 DP 350/600)。为了评估成形性,使用了 Nakazima 方法(实用)。制作了描述材料和中岛实验行为的有限元模型。为了通过数值方法预测成型极限应变,采用了厚度梯度准则。比较了实际结果和计算结果,以验证有限元模型。分析了四个不同的温度范围。总体而言,研究发现 400 °C 对两种钢材的成型极限都有负面影响。这种负面影响是由合金中的硅和锰等合金元素造成的。这些合金元素参与了高温下电阻系数的增减。对于 HSLA 350/440 钢,成形极限应变随温度升高而减小,最高温度为 600 °C,然后在 800 °C 时增大;而对于 DP 350/600 钢,成形极限应变在 400 °C 前减小,然后在 600 °C 和 800 °C 时增大。导致 DP 钢行为的另一个因素可能是硬马氏体与软铁素体相的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Temperature on the Forming Limits of High-Strength Low Alloy, and Dual-Phase Steels
High-strength steels (HSS) appear as a good alternative to common steels to reduce vehicle weight, thus reducing fuel consumption. Despite the excellent mechanical behavior towards its lower weight, its application in industry is still limited, as manufacturing such materials suffers from limitations, especially regarding formability. The literature shows springback to be the most common problem. Among the parameters that can be studied to minimize this problem, the temperature appears, according to the literature, to be one of the most influential parameters in minimizing springback. However, the consequence of the temperature increase on the forming limits of materials is not completely understood. This study proposes to determine the consequences of the use of the temperature rise technique in the forming limits of high-strength steels. Two different steels were studied (HSLA 350/440 and DP 350/600). To evaluate the formability, the Nakazima method was used (practical). Finite element models were made which describe the material as well as Nakazima experimental behavior. To predict the forming limit strains via the numerical method, the thickness gradient criterion was applied. The practical and computational results were compared to validate the finite element model. Four different temperature ranges were analyzed. In general, it was found that 400 °C has a negative impact on the forming limits of both steels. This negative effect was found to be due to the alloying elements, such as silicon and manganese, present in the alloy. These alloying elements take part in the increase and decrease in resistance coefficient at the elevated temperature. For HSLA 350/440 steel, the forming limit strain decreased with an increase in temperature up to 600 °C and then increased at 800 °C; whereas for DP 350/600 steel, the forming limit strain decreased till 400 °C and then increased for 600 °C and 800 °C. Another factor which might have contributed to the behavior of the DP steel is the interaction of hard martensite with soft ferrite phase.
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来源期刊
Journal of Manufacturing and Materials Processing
Journal of Manufacturing and Materials Processing Engineering-Industrial and Manufacturing Engineering
CiteScore
5.10
自引率
6.20%
发文量
129
审稿时长
11 weeks
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